Glue brush



FIG. 1 is a perspective view of a glue brush.

FIG. 2 is a side plan view thereof, sides being symmetric.

FIG. 3 is a top plan view thereof.

FIG. 4 is a bottom plan view thereof.

FIG. 5 is an end view thereof; and,

FIG. 6 is the other end view thereof. 

CLAIM The ornamental design for a glue brush, as shown and described. 